Cal. Gov. Code § 23253
At any time prior to final adjournment of the hearing on protests, any owner of property within the uninhabited territory proposed to be transferred may file written protest against the boundary change. The protest shall state the name of the owner of the property affected and the street address or other description of the property sufficient to identify it on the last equalized assessment roll. A metes and bounds description shall not be required if the property can be otherwise described in a manner sufficient to identify it on the last equalized assessment roll. Protests may be made on behalf of the owner by an agent authorized in writing by the owner to act as agent with respect to such land, except that protest may be made on behalf of a private corporation which is an owner of property by any officer or employee of the corporation without written authorization by the corporation to act as agent or make such protest.
Ca. Gov. Code § 23253